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Commit | Line | Data |
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6a5c8664 IA |
1 | /* |
2 | comedi/drivers/amplc_pc236.c | |
3 | Driver for Amplicon PC36AT and PCI236 DIO boards. | |
4 | ||
5 | Copyright (C) 2002 MEV Ltd. <http://www.mev.co.uk/> | |
6 | ||
7 | COMEDI - Linux Control and Measurement Device Interface | |
8 | Copyright (C) 2000 David A. Schleef <ds@schleef.org> | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | ||
24 | */ | |
25 | /* | |
26 | Driver: amplc_pc236 | |
27 | Description: Amplicon PC36AT, PCI236 | |
28 | Author: Ian Abbott <abbotti@mev.co.uk> | |
29 | Devices: [Amplicon] PC36AT (pc36at), PCI236 (pci236 or amplc_pc236) | |
0d6e5dad | 30 | Updated: Wed, 01 Apr 2009 15:41:25 +0100 |
6a5c8664 IA |
31 | Status: works |
32 | ||
33 | Configuration options - PC36AT: | |
34 | [0] - I/O port base address | |
35 | [1] - IRQ (optional) | |
36 | ||
37 | Configuration options - PCI236: | |
38 | [0] - PCI bus of device (optional) | |
39 | [1] - PCI slot of device (optional) | |
40 | If bus/slot is not specified, the first available PCI device will be | |
41 | used. | |
42 | ||
43 | The PC36AT ISA board and PCI236 PCI board have a single 8255 appearing | |
44 | as subdevice 0. | |
45 | ||
46 | Subdevice 1 pretends to be a digital input device, but it always returns | |
47 | 0 when read. However, if you run a command with scan_begin_src=TRIG_EXT, | |
0d6e5dad | 48 | a rising edge on port C bit 3 acts as an external trigger, which can be |
6a5c8664 IA |
49 | used to wake up tasks. This is like the comedi_parport device, but the |
50 | only way to physically disable the interrupt on the PC36AT is to remove | |
51 | the IRQ jumper. If no interrupt is connected, then subdevice 1 is | |
52 | unused. | |
53 | */ | |
54 | ||
70265d24 JS |
55 | #include <linux/interrupt.h> |
56 | ||
6a5c8664 IA |
57 | #include "../comedidev.h" |
58 | ||
59 | #include "comedi_pci.h" | |
60 | ||
61 | #include "8255.h" | |
62 | #include "plx9052.h" | |
63 | ||
64 | #define PC236_DRIVER_NAME "amplc_pc236" | |
65 | ||
66 | /* PCI236 PCI configuration register information */ | |
67 | #define PCI_VENDOR_ID_AMPLICON 0x14dc | |
68 | #define PCI_DEVICE_ID_AMPLICON_PCI236 0x0009 | |
69 | #define PCI_DEVICE_ID_INVALID 0xffff | |
70 | ||
71 | /* PC36AT / PCI236 registers */ | |
72 | ||
73 | #define PC236_IO_SIZE 4 | |
74 | #define PC236_LCR_IO_SIZE 128 | |
75 | ||
76 | /* | |
77 | * INTCSR values for PCI236. | |
78 | */ | |
79 | /* Disable interrupt, also clear any interrupt there */ | |
53106ae6 | 80 | #define PCI236_INTR_DISABLE (PLX9052_INTCSR_LI1ENAB_DISABLED \ |
9f7a344b BA |
81 | | PLX9052_INTCSR_LI1POL_HIGH \ |
82 | | PLX9052_INTCSR_LI2POL_HIGH \ | |
83 | | PLX9052_INTCSR_PCIENAB_DISABLED \ | |
84 | | PLX9052_INTCSR_LI1SEL_EDGE \ | |
85 | | PLX9052_INTCSR_LI1CLRINT_ASSERTED) | |
6a5c8664 | 86 | /* Enable interrupt, also clear any interrupt there. */ |
53106ae6 | 87 | #define PCI236_INTR_ENABLE (PLX9052_INTCSR_LI1ENAB_ENABLED \ |
9f7a344b BA |
88 | | PLX9052_INTCSR_LI1POL_HIGH \ |
89 | | PLX9052_INTCSR_LI2POL_HIGH \ | |
90 | | PLX9052_INTCSR_PCIENAB_ENABLED \ | |
91 | | PLX9052_INTCSR_LI1SEL_EDGE \ | |
92 | | PLX9052_INTCSR_LI1CLRINT_ASSERTED) | |
6a5c8664 IA |
93 | |
94 | /* | |
95 | * Board descriptions for Amplicon PC36AT and PCI236. | |
96 | */ | |
97 | ||
98 | enum pc236_bustype { isa_bustype, pci_bustype }; | |
99 | enum pc236_model { pc36at_model, pci236_model, anypci_model }; | |
100 | ||
57ad8696 | 101 | struct pc236_board { |
6a5c8664 IA |
102 | const char *name; |
103 | const char *fancy_name; | |
104 | unsigned short devid; | |
105 | enum pc236_bustype bustype; | |
106 | enum pc236_model model; | |
57ad8696 BP |
107 | }; |
108 | static const struct pc236_board pc236_boards[] = { | |
6a5c8664 | 109 | { |
0a85b6f0 MT |
110 | .name = "pc36at", |
111 | .fancy_name = "PC36AT", | |
112 | .bustype = isa_bustype, | |
113 | .model = pc36at_model, | |
114 | }, | |
6a5c8664 IA |
115 | #ifdef CONFIG_COMEDI_PCI |
116 | { | |
0a85b6f0 MT |
117 | .name = "pci236", |
118 | .fancy_name = "PCI236", | |
119 | .devid = PCI_DEVICE_ID_AMPLICON_PCI236, | |
120 | .bustype = pci_bustype, | |
121 | .model = pci236_model, | |
122 | }, | |
6a5c8664 IA |
123 | #endif |
124 | #ifdef CONFIG_COMEDI_PCI | |
125 | { | |
0a85b6f0 MT |
126 | .name = PC236_DRIVER_NAME, |
127 | .fancy_name = PC236_DRIVER_NAME, | |
128 | .devid = PCI_DEVICE_ID_INVALID, | |
129 | .bustype = pci_bustype, | |
130 | .model = anypci_model, /* wildcard */ | |
131 | }, | |
6a5c8664 IA |
132 | #endif |
133 | }; | |
134 | ||
135 | #ifdef CONFIG_COMEDI_PCI | |
136 | static DEFINE_PCI_DEVICE_TABLE(pc236_pci_table) = { | |
0a85b6f0 MT |
137 | { |
138 | PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI236, | |
139 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, { | |
140 | 0} | |
6a5c8664 IA |
141 | }; |
142 | ||
143 | MODULE_DEVICE_TABLE(pci, pc236_pci_table); | |
144 | #endif /* CONFIG_COMEDI_PCI */ | |
145 | ||
146 | /* | |
147 | * Useful for shorthand access to the particular board structure | |
148 | */ | |
57ad8696 | 149 | #define thisboard ((const struct pc236_board *)dev->board_ptr) |
6a5c8664 IA |
150 | |
151 | /* this structure is for data unique to this hardware driver. If | |
152 | several hardware drivers keep similar information in this structure, | |
9f7a344b BA |
153 | feel free to suggest moving the variable to the struct comedi_device struct. |
154 | */ | |
f1ee810a | 155 | struct pc236_private { |
6a5c8664 IA |
156 | #ifdef CONFIG_COMEDI_PCI |
157 | /* PCI device */ | |
158 | struct pci_dev *pci_dev; | |
9f7a344b | 159 | unsigned long lcr_iobase; /* PLX PCI9052 config registers in PCIBAR1 */ |
6a5c8664 IA |
160 | #endif |
161 | int enable_irq; | |
f1ee810a | 162 | }; |
6a5c8664 | 163 | |
f1ee810a | 164 | #define devpriv ((struct pc236_private *)dev->private) |
6a5c8664 IA |
165 | |
166 | /* | |
139dfbdf | 167 | * The struct comedi_driver structure tells the Comedi core module |
6a5c8664 IA |
168 | * which functions to call to configure/deconfigure (attach/detach) |
169 | * the board, and also about the kernel module that contains | |
170 | * the device code. | |
171 | */ | |
da91b269 BP |
172 | static int pc236_attach(struct comedi_device *dev, struct comedi_devconfig *it); |
173 | static int pc236_detach(struct comedi_device *dev); | |
139dfbdf | 174 | static struct comedi_driver driver_amplc_pc236 = { |
68c3dbff BP |
175 | .driver_name = PC236_DRIVER_NAME, |
176 | .module = THIS_MODULE, | |
177 | .attach = pc236_attach, | |
178 | .detach = pc236_detach, | |
179 | .board_name = &pc236_boards[0].name, | |
180 | .offset = sizeof(struct pc236_board), | |
8629efa4 | 181 | .num_names = ARRAY_SIZE(pc236_boards), |
6a5c8664 IA |
182 | }; |
183 | ||
184 | #ifdef CONFIG_COMEDI_PCI | |
185 | COMEDI_PCI_INITCLEANUP(driver_amplc_pc236, pc236_pci_table); | |
186 | #else | |
187 | COMEDI_INITCLEANUP(driver_amplc_pc236); | |
188 | #endif | |
189 | ||
190 | static int pc236_request_region(unsigned minor, unsigned long from, | |
0a85b6f0 | 191 | unsigned long extent); |
814900c9 BP |
192 | static void pc236_intr_disable(struct comedi_device *dev); |
193 | static void pc236_intr_enable(struct comedi_device *dev); | |
194 | static int pc236_intr_check(struct comedi_device *dev); | |
0a85b6f0 MT |
195 | static int pc236_intr_insn(struct comedi_device *dev, |
196 | struct comedi_subdevice *s, struct comedi_insn *insn, | |
197 | unsigned int *data); | |
198 | static int pc236_intr_cmdtest(struct comedi_device *dev, | |
199 | struct comedi_subdevice *s, | |
200 | struct comedi_cmd *cmd); | |
201 | static int pc236_intr_cmd(struct comedi_device *dev, | |
202 | struct comedi_subdevice *s); | |
203 | static int pc236_intr_cancel(struct comedi_device *dev, | |
204 | struct comedi_subdevice *s); | |
70265d24 | 205 | static irqreturn_t pc236_interrupt(int irq, void *d); |
6a5c8664 IA |
206 | |
207 | /* | |
208 | * This function looks for a PCI device matching the requested board name, | |
209 | * bus and slot. | |
210 | */ | |
211 | #ifdef CONFIG_COMEDI_PCI | |
212 | static int | |
da91b269 | 213 | pc236_find_pci(struct comedi_device *dev, int bus, int slot, |
0a85b6f0 | 214 | struct pci_dev **pci_dev_p) |
6a5c8664 IA |
215 | { |
216 | struct pci_dev *pci_dev = NULL; | |
217 | ||
218 | *pci_dev_p = NULL; | |
219 | ||
220 | /* Look for matching PCI device. */ | |
221 | for (pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON, PCI_ANY_ID, NULL); | |
0a85b6f0 MT |
222 | pci_dev != NULL; |
223 | pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON, | |
224 | PCI_ANY_ID, pci_dev)) { | |
6a5c8664 IA |
225 | /* If bus/slot specified, check them. */ |
226 | if (bus || slot) { | |
227 | if (bus != pci_dev->bus->number | |
0a85b6f0 | 228 | || slot != PCI_SLOT(pci_dev->devfn)) |
6a5c8664 IA |
229 | continue; |
230 | } | |
231 | if (thisboard->model == anypci_model) { | |
232 | /* Match any supported model. */ | |
233 | int i; | |
234 | ||
235 | for (i = 0; i < ARRAY_SIZE(pc236_boards); i++) { | |
236 | if (pc236_boards[i].bustype != pci_bustype) | |
237 | continue; | |
238 | if (pci_dev->device == pc236_boards[i].devid) { | |
239 | /* Change board_ptr to matched board. */ | |
240 | dev->board_ptr = &pc236_boards[i]; | |
241 | break; | |
242 | } | |
243 | } | |
244 | if (i == ARRAY_SIZE(pc236_boards)) | |
245 | continue; | |
246 | } else { | |
247 | /* Match specific model name. */ | |
248 | if (pci_dev->device != thisboard->devid) | |
249 | continue; | |
250 | } | |
251 | ||
252 | /* Found a match. */ | |
253 | *pci_dev_p = pci_dev; | |
254 | return 0; | |
255 | } | |
256 | /* No match found. */ | |
257 | if (bus || slot) { | |
258 | printk(KERN_ERR | |
0a85b6f0 MT |
259 | "comedi%d: error! no %s found at pci %02x:%02x!\n", |
260 | dev->minor, thisboard->name, bus, slot); | |
6a5c8664 IA |
261 | } else { |
262 | printk(KERN_ERR "comedi%d: error! no %s found!\n", | |
0a85b6f0 | 263 | dev->minor, thisboard->name); |
6a5c8664 IA |
264 | } |
265 | return -EIO; | |
266 | } | |
267 | #endif | |
268 | ||
269 | /* | |
270 | * Attach is called by the Comedi core to configure the driver | |
271 | * for a particular board. If you specified a board_name array | |
272 | * in the driver structure, dev->board_ptr contains that | |
273 | * address. | |
274 | */ | |
da91b269 | 275 | static int pc236_attach(struct comedi_device *dev, struct comedi_devconfig *it) |
6a5c8664 | 276 | { |
34c43922 | 277 | struct comedi_subdevice *s; |
6a5c8664 IA |
278 | unsigned long iobase = 0; |
279 | unsigned int irq = 0; | |
280 | #ifdef CONFIG_COMEDI_PCI | |
281 | struct pci_dev *pci_dev = NULL; | |
282 | int bus = 0, slot = 0; | |
283 | #endif | |
284 | int share_irq = 0; | |
285 | int ret; | |
286 | ||
287 | printk(KERN_DEBUG "comedi%d: %s: attach\n", dev->minor, | |
0a85b6f0 | 288 | PC236_DRIVER_NAME); |
6a5c8664 IA |
289 | /* |
290 | * Allocate the private structure area. alloc_private() is a | |
291 | * convenient macro defined in comedidev.h. | |
292 | */ | |
c3744138 BP |
293 | ret = alloc_private(dev, sizeof(struct pc236_private)); |
294 | if (ret < 0) { | |
6a5c8664 | 295 | printk(KERN_ERR "comedi%d: error! out of memory!\n", |
0a85b6f0 | 296 | dev->minor); |
6a5c8664 IA |
297 | return ret; |
298 | } | |
299 | /* Process options. */ | |
300 | switch (thisboard->bustype) { | |
301 | case isa_bustype: | |
302 | iobase = it->options[0]; | |
303 | irq = it->options[1]; | |
304 | share_irq = 0; | |
305 | break; | |
306 | #ifdef CONFIG_COMEDI_PCI | |
307 | case pci_bustype: | |
308 | bus = it->options[0]; | |
309 | slot = it->options[1]; | |
310 | share_irq = 1; | |
311 | ||
c3744138 BP |
312 | ret = pc236_find_pci(dev, bus, slot, &pci_dev); |
313 | if (ret < 0) | |
6a5c8664 IA |
314 | return ret; |
315 | devpriv->pci_dev = pci_dev; | |
316 | break; | |
317 | #endif /* CONFIG_COMEDI_PCI */ | |
318 | default: | |
319 | printk(KERN_ERR | |
0a85b6f0 MT |
320 | "comedi%d: %s: BUG! cannot determine board type!\n", |
321 | dev->minor, PC236_DRIVER_NAME); | |
6a5c8664 IA |
322 | return -EINVAL; |
323 | break; | |
324 | } | |
325 | ||
326 | /* | |
327 | * Initialize dev->board_name. | |
328 | */ | |
329 | dev->board_name = thisboard->name; | |
330 | ||
331 | /* Enable device and reserve I/O spaces. */ | |
332 | #ifdef CONFIG_COMEDI_PCI | |
333 | if (pci_dev) { | |
c3744138 BP |
334 | |
335 | ret = comedi_pci_enable(pci_dev, PC236_DRIVER_NAME); | |
336 | if (ret < 0) { | |
6a5c8664 | 337 | printk(KERN_ERR |
0a85b6f0 MT |
338 | "comedi%d: error! cannot enable PCI device and request regions!\n", |
339 | dev->minor); | |
6a5c8664 IA |
340 | return ret; |
341 | } | |
342 | devpriv->lcr_iobase = pci_resource_start(pci_dev, 1); | |
343 | iobase = pci_resource_start(pci_dev, 2); | |
344 | irq = pci_dev->irq; | |
345 | } else | |
346 | #endif | |
347 | { | |
348 | ret = pc236_request_region(dev->minor, iobase, PC236_IO_SIZE); | |
9f7a344b | 349 | if (ret < 0) |
6a5c8664 | 350 | return ret; |
6a5c8664 IA |
351 | } |
352 | dev->iobase = iobase; | |
353 | ||
354 | /* | |
355 | * Allocate the subdevice structures. alloc_subdevice() is a | |
356 | * convenient macro defined in comedidev.h. | |
357 | */ | |
c3744138 BP |
358 | ret = alloc_subdevices(dev, 2); |
359 | if (ret < 0) { | |
6a5c8664 | 360 | printk(KERN_ERR "comedi%d: error! out of memory!\n", |
0a85b6f0 | 361 | dev->minor); |
6a5c8664 IA |
362 | return ret; |
363 | } | |
364 | ||
365 | s = dev->subdevices + 0; | |
366 | /* digital i/o subdevice (8255) */ | |
c3744138 BP |
367 | ret = subdev_8255_init(dev, s, NULL, iobase); |
368 | if (ret < 0) { | |
6a5c8664 | 369 | printk(KERN_ERR "comedi%d: error! out of memory!\n", |
0a85b6f0 | 370 | dev->minor); |
6a5c8664 IA |
371 | return ret; |
372 | } | |
373 | s = dev->subdevices + 1; | |
374 | dev->read_subdev = s; | |
375 | s->type = COMEDI_SUBD_UNUSED; | |
376 | pc236_intr_disable(dev); | |
377 | if (irq) { | |
378 | unsigned long flags = share_irq ? IRQF_SHARED : 0; | |
379 | ||
5f74ea14 | 380 | if (request_irq(irq, pc236_interrupt, flags, |
6a5c8664 IA |
381 | PC236_DRIVER_NAME, dev) >= 0) { |
382 | dev->irq = irq; | |
383 | s->type = COMEDI_SUBD_DI; | |
384 | s->subdev_flags = SDF_READABLE | SDF_CMD_READ; | |
385 | s->n_chan = 1; | |
386 | s->maxdata = 1; | |
387 | s->range_table = &range_digital; | |
388 | s->insn_bits = pc236_intr_insn; | |
389 | s->do_cmdtest = pc236_intr_cmdtest; | |
390 | s->do_cmd = pc236_intr_cmd; | |
391 | s->cancel = pc236_intr_cancel; | |
392 | } | |
393 | } | |
394 | printk(KERN_INFO "comedi%d: %s ", dev->minor, dev->board_name); | |
395 | if (thisboard->bustype == isa_bustype) { | |
396 | printk("(base %#lx) ", iobase); | |
397 | } else { | |
398 | #ifdef CONFIG_COMEDI_PCI | |
399 | printk("(pci %s) ", pci_name(pci_dev)); | |
400 | #endif | |
401 | } | |
9f7a344b | 402 | if (irq) |
6a5c8664 | 403 | printk("(irq %u%s) ", irq, (dev->irq ? "" : " UNAVAILABLE")); |
9f7a344b | 404 | else |
6a5c8664 | 405 | printk("(no irq) "); |
6a5c8664 IA |
406 | |
407 | printk("attached\n"); | |
408 | ||
409 | return 1; | |
410 | } | |
411 | ||
412 | /* | |
413 | * _detach is called to deconfigure a device. It should deallocate | |
414 | * resources. | |
415 | * This function is also called when _attach() fails, so it should be | |
416 | * careful not to release resources that were not necessarily | |
417 | * allocated by _attach(). dev->private and dev->subdevices are | |
418 | * deallocated automatically by the core. | |
419 | */ | |
da91b269 | 420 | static int pc236_detach(struct comedi_device *dev) |
6a5c8664 IA |
421 | { |
422 | printk(KERN_DEBUG "comedi%d: %s: detach\n", dev->minor, | |
0a85b6f0 | 423 | PC236_DRIVER_NAME); |
9f7a344b | 424 | if (devpriv) |
6a5c8664 | 425 | pc236_intr_disable(dev); |
9f7a344b | 426 | |
6a5c8664 | 427 | if (dev->irq) |
5f74ea14 | 428 | free_irq(dev->irq, dev); |
9f7a344b | 429 | if (dev->subdevices) |
6a5c8664 | 430 | subdev_8255_cleanup(dev, dev->subdevices + 0); |
6a5c8664 IA |
431 | if (devpriv) { |
432 | #ifdef CONFIG_COMEDI_PCI | |
433 | if (devpriv->pci_dev) { | |
9f7a344b | 434 | if (dev->iobase) |
6a5c8664 | 435 | comedi_pci_disable(devpriv->pci_dev); |
6a5c8664 IA |
436 | pci_dev_put(devpriv->pci_dev); |
437 | } else | |
438 | #endif | |
439 | { | |
9f7a344b | 440 | if (dev->iobase) |
6a5c8664 | 441 | release_region(dev->iobase, PC236_IO_SIZE); |
6a5c8664 IA |
442 | } |
443 | } | |
444 | if (dev->board_name) { | |
445 | printk(KERN_INFO "comedi%d: %s removed\n", | |
0a85b6f0 | 446 | dev->minor, dev->board_name); |
6a5c8664 IA |
447 | } |
448 | return 0; | |
449 | } | |
450 | ||
451 | /* | |
452 | * This function checks and requests an I/O region, reporting an error | |
453 | * if there is a conflict. | |
454 | */ | |
455 | static int pc236_request_region(unsigned minor, unsigned long from, | |
0a85b6f0 | 456 | unsigned long extent) |
6a5c8664 IA |
457 | { |
458 | if (!from || !request_region(from, extent, PC236_DRIVER_NAME)) { | |
459 | printk(KERN_ERR "comedi%d: I/O port conflict (%#lx,%lu)!\n", | |
0a85b6f0 | 460 | minor, from, extent); |
6a5c8664 IA |
461 | return -EIO; |
462 | } | |
463 | return 0; | |
464 | } | |
465 | ||
466 | /* | |
467 | * This function is called to mark the interrupt as disabled (no command | |
468 | * configured on subdevice 1) and to physically disable the interrupt | |
469 | * (not possible on the PC36AT, except by removing the IRQ jumper!). | |
470 | */ | |
da91b269 | 471 | static void pc236_intr_disable(struct comedi_device *dev) |
6a5c8664 IA |
472 | { |
473 | unsigned long flags; | |
474 | ||
5f74ea14 | 475 | spin_lock_irqsave(&dev->spinlock, flags); |
6a5c8664 IA |
476 | devpriv->enable_irq = 0; |
477 | #ifdef CONFIG_COMEDI_PCI | |
478 | if (devpriv->lcr_iobase) | |
479 | outl(PCI236_INTR_DISABLE, devpriv->lcr_iobase + PLX9052_INTCSR); | |
480 | #endif | |
5f74ea14 | 481 | spin_unlock_irqrestore(&dev->spinlock, flags); |
6a5c8664 IA |
482 | } |
483 | ||
484 | /* | |
485 | * This function is called to mark the interrupt as enabled (a command | |
486 | * configured on subdevice 1) and to physically enable the interrupt | |
487 | * (not possible on the PC36AT, except by (re)connecting the IRQ jumper!). | |
488 | */ | |
da91b269 | 489 | static void pc236_intr_enable(struct comedi_device *dev) |
6a5c8664 IA |
490 | { |
491 | unsigned long flags; | |
492 | ||
5f74ea14 | 493 | spin_lock_irqsave(&dev->spinlock, flags); |
6a5c8664 IA |
494 | devpriv->enable_irq = 1; |
495 | #ifdef CONFIG_COMEDI_PCI | |
496 | if (devpriv->lcr_iobase) | |
497 | outl(PCI236_INTR_ENABLE, devpriv->lcr_iobase + PLX9052_INTCSR); | |
498 | #endif | |
5f74ea14 | 499 | spin_unlock_irqrestore(&dev->spinlock, flags); |
6a5c8664 IA |
500 | } |
501 | ||
502 | /* | |
503 | * This function is called when an interrupt occurs to check whether | |
504 | * the interrupt has been marked as enabled and was generated by the | |
505 | * board. If so, the function prepares the hardware for the next | |
506 | * interrupt. | |
507 | * Returns 0 if the interrupt should be ignored. | |
508 | */ | |
da91b269 | 509 | static int pc236_intr_check(struct comedi_device *dev) |
6a5c8664 IA |
510 | { |
511 | int retval = 0; | |
512 | unsigned long flags; | |
513 | ||
5f74ea14 | 514 | spin_lock_irqsave(&dev->spinlock, flags); |
6a5c8664 IA |
515 | if (devpriv->enable_irq) { |
516 | retval = 1; | |
517 | #ifdef CONFIG_COMEDI_PCI | |
518 | if (devpriv->lcr_iobase) { | |
519 | if ((inl(devpriv->lcr_iobase + PLX9052_INTCSR) | |
0a85b6f0 MT |
520 | & PLX9052_INTCSR_LI1STAT_MASK) |
521 | == PLX9052_INTCSR_LI1STAT_INACTIVE) { | |
6a5c8664 IA |
522 | retval = 0; |
523 | } else { | |
524 | /* Clear interrupt and keep it enabled. */ | |
525 | outl(PCI236_INTR_ENABLE, | |
0a85b6f0 | 526 | devpriv->lcr_iobase + PLX9052_INTCSR); |
6a5c8664 IA |
527 | } |
528 | } | |
529 | #endif | |
530 | } | |
5f74ea14 | 531 | spin_unlock_irqrestore(&dev->spinlock, flags); |
6a5c8664 IA |
532 | |
533 | return retval; | |
534 | } | |
535 | ||
536 | /* | |
537 | * Input from subdevice 1. | |
538 | * Copied from the comedi_parport driver. | |
539 | */ | |
0a85b6f0 MT |
540 | static int pc236_intr_insn(struct comedi_device *dev, |
541 | struct comedi_subdevice *s, struct comedi_insn *insn, | |
542 | unsigned int *data) | |
6a5c8664 IA |
543 | { |
544 | data[1] = 0; | |
545 | return 2; | |
546 | } | |
547 | ||
548 | /* | |
549 | * Subdevice 1 command test. | |
550 | * Copied from the comedi_parport driver. | |
551 | */ | |
0a85b6f0 MT |
552 | static int pc236_intr_cmdtest(struct comedi_device *dev, |
553 | struct comedi_subdevice *s, | |
554 | struct comedi_cmd *cmd) | |
6a5c8664 IA |
555 | { |
556 | int err = 0; | |
557 | int tmp; | |
558 | ||
559 | /* step 1 */ | |
560 | ||
561 | tmp = cmd->start_src; | |
562 | cmd->start_src &= TRIG_NOW; | |
563 | if (!cmd->start_src || tmp != cmd->start_src) | |
564 | err++; | |
565 | ||
566 | tmp = cmd->scan_begin_src; | |
567 | cmd->scan_begin_src &= TRIG_EXT; | |
568 | if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src) | |
569 | err++; | |
570 | ||
571 | tmp = cmd->convert_src; | |
572 | cmd->convert_src &= TRIG_FOLLOW; | |
573 | if (!cmd->convert_src || tmp != cmd->convert_src) | |
574 | err++; | |
575 | ||
576 | tmp = cmd->scan_end_src; | |
577 | cmd->scan_end_src &= TRIG_COUNT; | |
578 | if (!cmd->scan_end_src || tmp != cmd->scan_end_src) | |
579 | err++; | |
580 | ||
581 | tmp = cmd->stop_src; | |
582 | cmd->stop_src &= TRIG_NONE; | |
583 | if (!cmd->stop_src || tmp != cmd->stop_src) | |
584 | err++; | |
585 | ||
586 | if (err) | |
587 | return 1; | |
588 | ||
589 | /* step 2: ignored */ | |
590 | ||
591 | if (err) | |
592 | return 2; | |
593 | ||
594 | /* step 3: */ | |
595 | ||
596 | if (cmd->start_arg != 0) { | |
597 | cmd->start_arg = 0; | |
598 | err++; | |
599 | } | |
600 | if (cmd->scan_begin_arg != 0) { | |
601 | cmd->scan_begin_arg = 0; | |
602 | err++; | |
603 | } | |
604 | if (cmd->convert_arg != 0) { | |
605 | cmd->convert_arg = 0; | |
606 | err++; | |
607 | } | |
608 | if (cmd->scan_end_arg != 1) { | |
609 | cmd->scan_end_arg = 1; | |
610 | err++; | |
611 | } | |
612 | if (cmd->stop_arg != 0) { | |
613 | cmd->stop_arg = 0; | |
614 | err++; | |
615 | } | |
616 | ||
617 | if (err) | |
618 | return 3; | |
619 | ||
620 | /* step 4: ignored */ | |
621 | ||
622 | if (err) | |
623 | return 4; | |
624 | ||
625 | return 0; | |
626 | } | |
627 | ||
628 | /* | |
629 | * Subdevice 1 command. | |
630 | */ | |
da91b269 | 631 | static int pc236_intr_cmd(struct comedi_device *dev, struct comedi_subdevice *s) |
6a5c8664 IA |
632 | { |
633 | pc236_intr_enable(dev); | |
634 | ||
635 | return 0; | |
636 | } | |
637 | ||
638 | /* | |
639 | * Subdevice 1 cancel command. | |
640 | */ | |
0a85b6f0 MT |
641 | static int pc236_intr_cancel(struct comedi_device *dev, |
642 | struct comedi_subdevice *s) | |
6a5c8664 IA |
643 | { |
644 | pc236_intr_disable(dev); | |
645 | ||
646 | return 0; | |
647 | } | |
648 | ||
649 | /* | |
650 | * Interrupt service routine. | |
651 | * Based on the comedi_parport driver. | |
652 | */ | |
70265d24 | 653 | static irqreturn_t pc236_interrupt(int irq, void *d) |
6a5c8664 | 654 | { |
71b5f4f1 | 655 | struct comedi_device *dev = d; |
34c43922 | 656 | struct comedi_subdevice *s = dev->subdevices + 1; |
6a5c8664 IA |
657 | int handled; |
658 | ||
659 | handled = pc236_intr_check(dev); | |
660 | if (dev->attached && handled) { | |
661 | comedi_buf_put(s->async, 0); | |
662 | s->async->events |= COMEDI_CB_BLOCK | COMEDI_CB_EOS; | |
663 | comedi_event(dev, s); | |
664 | } | |
665 | return IRQ_RETVAL(handled); | |
666 | } |